Cheaper than lithium, and constructed using very common materials, molten salt batteries could be back on the menu thanks to a new steel-based membrane between the electrodes. The discovery could pave the way for cheap, grid-level power storage that will allow cities to use more renewable energy.
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As good as it is as an electrode material, lithium is relatively rare and expensive. In the search for a cheaper alternative, a Stanford team has developed a sodium-ion battery that would beat lithium-ion batteries in terms of cost per storage capacity.
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​Stainless steel mesh is often used as filters and screens but once the material gets coated in rust and weakened, it's usually just discarded. Now Chinese scientists have figured out a way to take that metal trash and turn into high-performing treasure as electrodes in potassium ion batteries.
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Researchers have used defective apples to produce a cheap and high-performance electrode for a sodium-ion battery, with applications including grid storage, portable electronics and electric cars.
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Researchers at the University of Illinois have come up with a new battery design that not only relies on salt water to store and release electricity, but removes the salt ions from the water in the process.
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